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September 2013 Doc ID 13329 Rev 10 1/31
1
VNQ5050AK-E
Quad channel high side driver with analog current sense
for automotive applications
Features
■
General features:
– Inrush current active management by
power limitation
– Very low standby current
– 3.0V CMOS compatible input
– Optimized electromagnetic emission
– Very low electromagnetic susceptibility
– In compliance with the 2002/95/EC
European directive
■
Diagnostic functions:
– Proportional load current sense
– High current sense precision for wide
current range
– Current sense disable
– Thermal shutdown indication
– Very low current sense leakage
■
Protection:
– Undervoltage shutdown
– Overvoltage clamp
– Load current limitation
– Self limiting of fast thermal transients
– Protection against loss of ground and loss of V
CC
– Thermal shutdown
– Reverse battery protection (see Figure 25)
– Electrostatic discharge protection
Application
■
All types of resistive, inductive and capacitive
loads.
■
Suitable as LED driver.
Description
The VNQ5050AK-E is a monolithic device made
using STMicroelectronics VIPower M0-5
technology. It is intended for driving resistive or
inductive loads with one side connected to
ground. Active V
CC
pin voltage clamp protects the
device against low energy spikes (see ISO7637
transient compatibility table).
This device integrates an analog current sense
which delivers a current proportional to the load
current (according to a known ratio) when
CS_DIS is driven low or left open. When CS_DIS
is driven high, the CURRENT SENSE pin is in a
high impedance condition.
Output current limitation protects the device in
overload condition. In case of long overload
duration, the device limits the dissipated power to
a safe level up to thermal shutdown intervention.
Thermal shutdown with automatic restart allows
the device to recover normal operation as soon as
the fault condition disappears.
Parameters Symbol Value
Max supply voltage V
CC
41 V
Operating voltage range V
CC
4.5 to 36 V
Max on-state resistance (per ch.) R
ON
50 mΩ
Current limitation (typ) I
LIMH
19 A
Off-state supply current I
S
2µA
(1)
1. Typical value with all loads connected.
PowerSSO-24
Table 1. Device summary
Package
Order codes
Tube Tape and Reel
PowerSSO-24 VNQ5050AK-E VNQ5050AKTR-E
www.st.com
